US2169094A - Driving and stopping mechanism - Google Patents

Description

Aug. 8, 1939 J. FOSSA DRIVING AND STOPPING MECHANISM Original Filed May 11, 1935 6 Sheets-Sheet 1 Snnentor Zn-44v (lttomegs Aug. 8,1939 J. FOSSA DRIVIN AND STOPPING MECHANISM 6 Sheets-Sheet 2 Original Filed May 11, 1935 Bummer 1741.

E f, J tittomegs Aug. 8, 1939 J. FOSSA 2,169,094

DRIVING AND STOPPING MECHANISM v Original Filed May 11, 1955 6 Sheets-Sheet 3 Zhmentor Gttornegs Aug. 8,1939 J, Foss 2,169,094 v DRIVING AND STOPPING MECHANISM Original Filed May 11, 1935 6 Sheets-Sheet 4 Gttorne Aug. 8, .1939 J. FossA DRIVING AND STOPPING MECHANISM Original Filed May 11, 1935 6 Sheets-Sheet 5- Inventor Aug. 8, 1939 V J. FossA DRIVING AND STOPPING MECHANISM Original Filed May 11, 1935 6 Sheets-Sheet 6 E 8 Nb an ttornel Patented Aug. 8, 1939 UNITED STATES PATENT OFFICE 2,169,094 DRIVING AND STOPPING MECHANISM Joseph Fossa, Salem, Mass, assignor to United Shoe Machinery Corporation, Paterson, N. J., a corporation of New Jersey Original application May 11, 1935, Serial No. 21,011. Divided and this application July 20, 1937, Serial No. 154,603

11 Claims. (Cl. 192148) The present invention relates to driving and whereby the starting of the machine is insured, stopping mechanisms, and is herein disclosed as even if the treadle is released immediately upon applied to the shoe upper lacing machine debeing depressed. scribed in the inventors pending application Se- In accordance with another feature of the inrial No. 21,011, filed May 11, 1935, of which applivention, means actuated by the stop cam are 5 cation the present application is a division. While provided for rendering inoperative the connecnot necessarily limited to use in any particular tions through which the control member is actutype of machine, a driving and stopping mechaated by the treadle, whereby a repeated operanism embodying the invention is particularly tion of the machine is prevented even if the adapted for use in a machine comprising several treadle is depressed continuously. 10 operating or cam shafts running at different Other features of the present invention consist speeds. in the novel mechanical devices, combinations Generally stated, the object of the present inand arrangements of parts hereinafter described vention is to provide a novel and improved drivand claimed.

ing and stopping mechanism, particularly appli- The several features of the present invention, 15 cable for use in machines which, when set in opand the advantages to be obtained thereby will be eration, are out of control of the operator and readily understood by one skilled in the art from which are automatically brought to rest when the the following description, taken in connection operation which the machine is designed to perwith the accompanying drawings in which Figure form. is completed. More specifically the objects 1 is a view in left side elevation of a shoe upper 20 of the invention are to provide a driving and stoplacing machine embodying the driving and stopping mechanism in which the main driving clutch ping mechanism of the present invention; Figure can be thrown intooperation fully, with certainty 2 is a view in side elevation looking from the and with slight exertion on the part of the op right of the machine; Figure 3 is a view in rear erator, and to provide a' driving and stopping elevation of the machine shown in Figure 1; Fig- 25 mechanism by which the machine will be surely ure 4 is a view in elevation looking from the right, maintained in operation and out of control of partly in section and partly broken away, showthe operator until its operations are fully coming certain parts of the driving and stopping pleted and will then be stopped with the machine mechanisms in stopping positions; Figure 5 is a parts in the required position to permit the masimilar view with the same parts in starting 30 chine to be again put into operation. positions; Figure 6 is a sectional View taken along With the above objects in View, a driving and the line 6-6 of Figure 4; Figure 7 is a sectional stopping mechanism embodying the present inview, taken along the line 17 of Figure 5; Figvention will comprise a suitable clutch for conure 8 is another sectional view taken along the necting and disconnecting a driving member and line 8-8 of Figure 6, illustrating positions as- 35 shaft, a clutch control member, the movement of sumed by the parts subsequently to those shown which causes the clutch to connect and disconnect in Figure 5; Figure 9 is a detail view of the clutch the driving member and shaft, and a single revotaken. in section on line 9-9 of Figure 6; and lution stop cam driven by the shaft and engaging Figure 10 is a sectional view taken along the line the lever. Ill-l0 of Figure 8. 4

In accordance with one feature of the present The machine illustrated in the drawings is a invention a treadle controlled power mechanism shoe upper lacing machine and is provided with is combined with these parts for actuating the a row of parallel eye pointed needles on which, clutch control member, whereby the clutch can while stationary, oppositely disposed aligned eyebe operated with certainty and with slight exerlets in the quarter portions of a folded upper are 45 tion on the part of the operator. impaled by the operator. When the machine is In the mechanism hereinafter specifically destarted, the upper is gripped in its folded conscribed, an initial movement is imparted to the dition and held in the machine until the lacing is clutch control member from a foot treadle and, completed. Thereafter, the upper drops from the in accordance with a further feature of the presmachine and the machine is brought to rest. 50 ent invention, a movable member is provided on The moving parts of the machine are actuated the stop cam which is released by the movement while the machine is in operation through trains of the clutch control member under the action of of mechanisms driven from a number of shafts the treadle, and acts to prevent an immediate which rotate at diiferent speeds and which comreturn movement of the clutch control member, prise a main shaft 2 which makes six complete 55 revolutions during the operation on a shoe upper, and a shaft l3 which makes a single revolution during the operation on the upper.

The driving and stopping mechanism of the machine comprises a main driving pulley 6 for driving the shaft 2 and a clutch, hereinafter described, by which the driving pulley is connected to and disconnected from the shaft. The pulley 6 is caused to be connected with the shaft by the depression of a treadle connected rod 8. A spring l6 coiled about the rod causes it to rise when the treadle is released. After the pulley is connected to the shaft 2, it is held in engagement therewith out of the control of the operator until the shaft has made six complete revolutions and is then automatically disconnected from the shaft to bring the machine to rest with its actuating parts. in the desired position. The means for accomplishing this result comprise a stop cam 64 secured to the right end of the single revolution shaft l3 which is driven from the shaft 2 through a pinion H on the shaft 2, and a gear l2 on the shaft IS.

The main driving pulley 6 is loosely supported at the end of the main driving shaft 2 in part by a sleeve l5 (Fig. 6) mounted to slide on the shaft and connected with the shaft by a key l6. The shaft is of reduced diameter towards its outer end, providing a shoulder l1 against which one end of a compression spring l8 rests. The other end of the spring l8 engages an internal shoulder l9 formed within the sleeve l5 between a portion of the central passage therein which slidably fits the main shaft 2 and another portion of the central passage which fits the reduced end of the shaft. Compression spring i8 thus tends to force the sleeve outwardly on the shaft. The driving pulley 6 is rotatable on a reduced portion of the sleeve l5 and is held in position longitudinally of the shaft by a collared bushing 2i and a washer 26 secured against a shoulder formed at the end of the shaft by a still further reduced and threaded portion of the shaft carrying a nut 22. Between the bushing and the washer is loosely mounted a collar 24 secured to the hub of the driving pulley 6 by screws 26.

The clutch for connecting the driving pulley 6 to the shaft 2 comprises a cup-shaped bushing 28 within a suitable recess in the driving pulley 6 frictionally connected to the pulley by means of friction members 36 (see Fig. 9) riveted to a clamp ring 32 made in three sections and connected by suitable adjusting screws 34. The outer end of the bushing 28 is provided with arcuate slots 36 into which the ends of pins 38 on the sleeve l5 enter when the sleeve is moved along the shaft towards the end by the spring 18.

To connect or disconnect the sleeve l5 and the bushing 28, a vertical controlling rod 46 is provided to slide in a bracket 42 secured to the machine frame. This rod, when raised, cooperates with a cam slot 44 in the sleeve 15 to move the sleeve inwardly to bring the machine to rest. The rod is raised towards the sleeve by a spring 46 on the rod, compressed between the lower portion of the bracket 42 and a block 48 fixed to the rod. When the rod is withdrawn from. the sleeve E5, the spring 18 causes the sleeve to move outwardly along the shaft and the pins 38 to enter the arcuate slots 36, establishing a driving connection between the shaft 2 and the driving pulley 6. However, the friction members 30 are so adjusted that slippage may take place between the bushing 28 and the pulley 6 as the driving shaft 2 is being brought up to speed,

but sufficient friction is obtained to prevent slippage after the machine is brought up to speed. With such an adjustment, the slippage in the frictional connection will gradually decrease to zero as the shaft speed increases and reaches zero slippage when the shaft is driven at the speed of the pulley. Such a connection is not only advantageous in starting the machine, but is also advantageous when the machine, through improper adjustment or other cause, is given an excessive load, the connection permitting the drive shaft to stop without causing injury to the parts of the machine.

To bring the machine to rest with the shaft 2 at a definite angular position, there is secured to the shaft a brake drum 50 and surrounding the brake drum is a band 52 having frictional material 54 secured to its inner face. One end of the brake band is pivotally mounted on a pin 56 (Fig. 8) passing through the bifurcated end 58 of a lever 66. The lever 60 is loosely mounted on the right end of a shaft 62 in the frame of the machine. Also loosely mounted on the pin 56 is a lever 64 having a cam face 66 (Fig. 6) arranged to cooperate with a cam surface 68 formed at the inner end of the sleeve l5. The cam lever 64 is connected to the other end of the brake band 52 by connections comprising an adjusting screw 16 passing loosely through a swivel block 12 clamped to a pin 14 passing through the lever 64. The screw I6 is threaded into a block 16 rotatable about a pivot 18 in said other end of the brake band. The pin 14 is held in the lever 64 by a clamping bolt 86.

The diameter of the brake band is determined by adjusting the screw 16, and in order to maintain the band in concentric relation with the brake drum, two adjustable stop screws 82 and 84 are provided, on which two separate portions of the brake band rest. These stop screws and the pivotal mounting of the band on the lever 60, and the pivotal mounting of this lever itself, permit the brake band to float freely without normally touching the brake drum 56 When it is desired to stop the machine, the control rod 46 is permitted to be lifted automatically by the spring 46 and the end of this rod engages the outer surface of the sleeve l5 until the cam slot 44 reaches such a position that the upper end of the rod will enter the slot. The shape of the cam slot is such that, upon continued rotation, the sleeve I5 is brought inwardly (to the left in Fig. 6) to disconnect the pins 38 from the slots 36, thus stopping the drive of the shaft from the pulley 6. As this disconnection takes place, the cam surface 68 on the sleeve [5 has become positioned beneath the cam lever 64 so that the cam face 66 thereon starts to ride upon the cam surface 68. The cam face 66 is lifted by a gradual rise on the cam surface 68 which causes the cam lever 64 to pull on the adjusting screw 16, through the pin 14 and swivel block 12. The screw 16 pulls on the block 76 and pivot 18, to contract the brake band so that its friction material 54 engages the brake drum 5!] with increasing force, to slow down the rotation of the shaft. The end of the cam surface 68 is steep to form an abutment 86 (Fig. 8) which, when it strikes the side portion of the cam face 66, stops the machine in a definite angular position. As the speed has been reduced gradually by the increasing force with which the brake band has been contracted, this final stopping at a definite angular position is without substantial shock.

When the machine is started again, by the withdrawal of the controlling rod 48 from the cam slot 44, the spring I8 in sliding sleeve I5 to the right not only causes the pins 38 to engage the slots 38, but it also causes the cam surface 68 on the sleeve to withdraw from beneath the cam lever 64, releasing the brake, which then expands, due to the elasticity of the brake band 52 to clear the brake drum.

To draw the controlling rod 48 downwardly from the cam slot 44 in starting the machine, there are provided normally inoperative mechanism driven by the driving pulley 8 and connections operated by the treadle rod 8 for rendering the connections operative. The block 48 on the rod carries a vertically arranged adjusting set screw 88 threaded into the block with a hexagonal head extending upwardly. Forwardly and above the adjusting screw 88 is an arm 98 pivotally mounted on a stud 92 on the side frame of the machine, so arranged that when the end of the arm is forced downwardly it abuts the screw and causes the rod 48 to be depressed. The arm is held in raised position away from the head of the screw 48 while the machine is at rest by a spring 94 coiled about the hub of the arm with one end engaging the underside of the arm and the other end, an opening in the machine frame.

The treadle rod 8 is so arranged that When depressed it will cause the arm 98 to be moved downwardly until it engages, without actually moving, the screw 88. Thereafter further downward movement of the arm 98 against the screw is caused automatically by the connections actuated by the driving pulley 8. To cause downward movement of the arm 98 when the treadle is depressed, the upper end of the treadle rod 8 is pivotally connected to a hook member 96 arranged to engage a roll 98 rotatable on a pivot I88 on the central part of the arm 98. To cause further downward movement of the arm 98, the arm carries a stud screw I82 on which is a lever I84 having a cam roll I88 engaging a circular eccentric cam I88 secured to the driving pulley 6. While the driving pulley is being rotated the lever I84 is oscillated continuously thereby. To hold the cam roll I 88 in engagement with the cam I88, a tension spring H8 is stretched between a pin on the arm 98 and a pin on the lever I 84. When the arm 98 is moved downwardly, the roll I 88 on the lever I84 being held against the cam I89 acts as a fulcrum point for the lever I84 and the forward arm of the lever I84 is moved downwardly relatively to the arm 98. When moved downwardly the forward end of the lever I84 is held by a latch member I I2 pivotally mounted at its lower end on a screw II4 secured in the arm 98 and yieldingly held in engagement with the lever I84 during operation of the machine by a spring IIB connected between the arm 98 and the latch member. The lever I84 is not latched until the forward arm of the lever is lowered against the screw 88 by the treadle. After the lever I84 is latched, the lever and the arm 98 act as a unit as the cam I88 rotates to withdraw the controlling rod 48 from the cam slot 44 and start the machine in operation. When the machine is again brought to rest, the driving pulley B and cam I88 only are rotated, and the lever I84 is oscillated idly by the cam I88, the latch member II2 held out of engagement with the lever I84, as shown in Figure 4.

To hold the latch member II2 out of engagement with the lever I84 when the machine is at rest, a pin H8 is provided in the upper end of the latch member in a position to be engaged by a, cam block I28 secured to the right side of the-circular stop cam. I 4, the stop cam I4 being rotated once for each complete operation of the machine. The latch member II2 is permitted to move into engagement with the lever I 84 to start the machine when the arm 98 carrying the latch is lowered by depressing the treadle rod 8, moving the pin I8 away from the block I28.

After the treadle rod 8 is depressed, the pin II8 moves rearwardly beneath the lower end of the cam block I 28 of the cam I4 into the position shown in Figure 5, where an upper arcuate portion of the latch may first engage the lever I84, and as the end of the lever moves downwardly, it passes beneath the shoulder on the latch. Thereafter, as the cam I88 rotates, the lever I84 being latched rigidly with the arm 98,

the arm is moved still further downwardly, With- 7 drawing the controlling rod 48 from the cam slot 44. The shaft 2 is then connected to the driving pulley 6 and the machine is started. The arm 98 is then held down for one revolution by the concentric outer surface of the cam. I4 engaging the roll 98 on the arm 98 during six rotations of the main shaft 2.

After the machine has completed its operations, the roll 98 enters a recess I22 in the cam. I4 and the controlling rod 48 is allowed to engage the tam slot 44 and stop the machine.

To prevent the arm 98 from being raised immediately after starting the machine, there is loosely mounted at the end of the shaft I3 a lever I 24 held on the end of the shaft by a washer and screw I28 threaded into the end of the shaft. As soon as the arm 98 is depressed by the action of the cam I88 and lever I84, the lower arcuate end of the lever I24 slides over the roll 99 under the action of a spring I28 stretched between the upper end of the lever I24 and a pin on the cam I4. The arrangement of cam I4 is such that it will depress arm 98 slightly lower than the position to which it was moved by the oscillating lever I 84 so that the lever will be held away from the latch shoulder. Since the driving pulley 8 makes six revolutions during one complete operation of the machine, the lever I84 will be oscillated idly below the shoulder of the latch member II2 six times during a lacing operation, the arm 98 remaining in its lowest position.

Further downward movement of the treadle rod 8 after the free end of the arm 98 contacts the head of the set screw 88 is prevented by a pin I38 passing through the rod 8 and arranged to engage the upper surface of a boss I32 which slidably supports the rod on the machine frame.

To prevent continued operation of the machine in case the treadle rod is held in depressed position during and after completion of the machine operation, the hook member 96 which is pivotally mounted at the upper end of the treadle rod is arranged to swing forwardly of the machine out of engagement with the roll 98. The hook member is held yieldingly in engagement with the roll by a spring I34 connected between pins on the boss I32 and on the hook member respectively. As the arm 98 is depressed and the machine started, the hook member 96 is acted upon by the lever I24 to disconnect it from the roll. As the roll 98 enters the recess I22 of the cam I4 at the end of the operation, it is engaged by the advancing edge or shoulder of the lever I24 and the lever is held against rotation by the roll until the machine is again started. At the same time that the roll 98 enters the recess I22 of the cam, the block I20 acts against the pin I I8 to withdraw the latch member from engagement with the lever I04 and prevent another operation of the machine.

The nature and scope of the invention having been indicated, and a construction embodying a particular feature of the invention having been specifically described, what is claimed is:

1. A driving and stopping mechanism having, in combination, a shaft, a driving member therefor, a clutch to connect and disconnect the driving member and shaft, a movable clutch control member, connections between the control member and clutch for causing the clutch to connect and disconnect the driving member and shaft, a single revolution stop cam in addition to said connections between the control member and the clutch driven by the shaft and engaged by the clutch control member, said cam acting at the completion of its rotation to actuate the clutch control member to cause the clutch to disconnect the driving member and shaft normally inoperative mechanism driven by the driving member for actuating the clutch controlling member to cause the clutch to connect the driving member and shaft, and treadle operated connections for rendering said mechanism operative.

2. A driving and stopping mechanism having, in combination, a multiple revolution shaft, a driving member therefor, a clutch to connect and disconnect the driving member and shaft, a single revolution stop cam driven by the shaft, a movable clutch control member engaged by the cam, connections exclusive of the stop cam between the control member and the clutch for causing the clutch to connect and disconnect the driving member and multiple revolution shaft, said cam acting at the completion of its rotation to actuate the clutch control member to cause the clutch to disconnect the driving member and shaft, normally inoperative mechanism driven by the driving member for actuating the clutch controlling member to cause the clutch to connect the driving member and multiple revolution shaft, and treadle operated connections for rendering said mechanism operative.

3. A driving and stopping mechanism having, in combination, a shaft, a driving member therefor, a clutch to connect and disconnect the driving member and shaft, a movable clutch control member, connections between the control member and clutch for causing the clutch to connect and disconnect the driving member and shaft, a single revolution stop cam in addition to said connections between the control member and the clutch driven by the shaft and engaged by the clutch control member, said cam acting at the completion of its rotation to actuate the clutch control member to cause the clutch to disconnect the driving member and shaft, a cam on the driving member, mechanism driven by the cam for actuating the clutch controlling member to cause the clutch to connect the driving member and shaft, and treadle operated connections for rendering said mechanism operative.

4. A driving and stopping mechanism having, in combination, a shaft, a driving member therefor, a clutch to connect and disconnect the driving member and shaft, a movable clutch control member, connections between the control member and clutch for causing the clutch to connect and disconnect the driving member and shaft, a single revolution stop cam in addition to said connections between the control member and the clutch driven by the shaft and engaged by the clutch control member, said cam acting at the completion of its rotation to actuate the clutch control member to cause the clutch to disconnect the driving member and shaft a cam on the driving member, a member actuated by the cam on the driving member, a latch to connect the cam actuated member and the clutch control member to cause the clutch to connect the driving member and shaft, and treadle operated connections for causing the latch to connect said members.

5. A driving and stopping mechanism having, in combination, a shaft, a driving member therefor, a clutch to connect and disconnect the driving member and shaft, a movable clutch control member, connections between the control member and clutch for causing the clutch to connect and disconnect the driving member and shaft, a single revolution stop cam in addition to said connections between the control member and the clutch driven by the shaft and engaged by the clutch control member said cam acting at the completion of its rotation to actuate the clutch control member to cause the clutch to disconnect the driving member and shaft a cam on the driving member, a member actuated by the cam on the driving member, a latch mounted on the control member, means for holding the latch in inoperative position, and treadle operated connections for causing the latch to connect the control member and the cam actuated member to cause the clutch to connect the driving member and shaft.

6. A driving and stopping mechanism having, in combination, a shaft, a driving member therefor, a clutch to connect and disconnect the driving member and shaft, a movable clutch control member, connections between the control member and clutch for causing the clutch to connect and disconnect the driving member and shaft, a single revolution stop cam in addition to said connections between the control member and the clutch driven by the shaft and engaged by the clutch control member, said cam acting at the completion of its rotation to actuate the clutch control member to cause the clutch to disconnect the driving member and shaft a cam on the driving member, a member actuated by the cam on the driving member, a latch to connect the cam actuated member and the clutch control member to cause the clutch to connect the driving member and shaft, treadle operated connections for causing the latch to connect said members, and a cam driven by the shaft for moving the latch to inoperative position.

'7. A driving and stopping mechanism having, in combination, a shaft, a driving member therefor, a clutch to connect and disconnect the driving member and shaft, a movable clutch control member, connections between the control member and clutch for causing the clutch to connect and disconnect the driving member and shaft, a single revolution stop cam in addition to said connections between the control member and the clutch driven by the shaft and engaged by the clutch control member, said cam acting at the completion of its rotation to actuate the clutch control member to cause the clutch to disconnect the driving member and shaft means for moving the clutch control member to cause the clutch to connect the driving member and shaft, and a member released by the movement of the control member yieldingly mounted for limited rotation with relation to the stop cam and movable, when released, to a position in which return movement of the control member is prevented.

8. A driving and stopping mechanism having, in combination, a shaft, a driving member therefor, a clutch to connect and disconnect the driving member and shaft, a movable clutch control member, connections between the control member and clutch for causing the clutch to connect and disconnect the driving member and shaft, a single revolution stop cam in addition to said connections between the control member and the clutch driven by the shaft and engaged by the clutch control member, said cam acting at the completion of its rotation to actuate the clutch control member to cause the clutch to disconnect the driving member and shaft and means including treadle operated connections for moving the clutch control member to cause the clutch to connect the driving member and shaft, said connections including means actuated by the stop cam for rendering said connections inoperative to prevent return movement of the control member.

9. A driving and stopping mechanism having, in combination, a shaft, a driving member therefor, a clutch to connect and disconnect the driving member and shaft, a movable clutch control member, connections between the control member and clutch for causing the clutch to connect and disconnect the driving member and shaft, a single revolution stop cam driven by the shaft and engaged by the clutch control member, a cam on the driving member, a cam actuated lever mounted on the control member, a latch mounted on the control member movable, when released, to connect the control member and the cam actuated lever to cause the clutch to connect the driving member and shaft, an abutment on the stop cam to hold the latch in inoperative position, and treadle operated connections for moving the control member to release the latch.

10. A driving and stopping mechanism having, in combination, a shaft, a driving member therefor, a clutch to connect and disconnect the driving member and shaft, a movable clutch control member, connections between the control member and clutch for causing the clutch to connect and disconnect the driving member and shaft, a single revolution stop cam driven by the shaft and engaged by the clutch control member, means including treadle operated connections for moving the clutch control member to cause the clutch to connect the driving member and shaft, said connections including means actuated by the stop cam for rendering said connections inoperative to prevent return movement of the control member, and a member released by the movement of the control member yieldingly mounted for limited rotation with relation to the stop cam and movable, when released, to a position in which return movement of the control member is prevented.

11. A driving and stopping mechanism having, in combination, a shaft, a driving member therefor, a clutch to connect and disconnect the driving member and shaft, a movable clutch control member, connections between the control member and clutch for causing the clutch to connect and disconnect the driving member and shaft, a single revolution stop cam driven by the shaft and engaged by the clutch control member, a cam on the driving member, a lever actuated by the cam mounted on the control member, a latch on the control member movable, when released, to connect the control member and cam actuated lever to cause the clutch to connect the driving member and shaft, an abutment on the stop cam to hold the latch in inoperative position, means including treadle operated connections for moving the clutch control member to release the latch, said connections including means actuated by the stop cam for rendering said connections inoperative to prevent return movement of the control member, and a member released by the movement of the control member yieldingly mounted for limited rotation with relation to the stop cam and movable, when released, to a position in which return movement of the control member is prevented.

JOSEPH FOSSA.

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